[When my sister forced my fiancée onto me, His Majesty the Silver Wolf, who was supposed to be a tyrant, fell in love with me.] After her sister forced her to marry the king, Airi, the daughter of a count, went up to the royal palace in haste as a scapegoat. The king, who draws the blood of the silver wolf and is rumored to be a beast, will be ruined immediately! ? I try to make it through somehow, but I end up spending the night with him! Airi is in a desperate situation, but-- "It feels good, please pet me more." 妹に国王との婚約を押しつけられ、急遽身代わりとして王宮へ上がった伯爵令嬢アイリ。銀狼の血を引き、ケダモノと噂される国王に身バレは即破滅!? 何とかやり過ごそうとするも、早くも一夜を共にすることになってしまう！ 絶体絶命のアイリだったが―― 「気持ちいい、もっと撫でてくれ」獰猛なはずの彼がなぜかわんこのように懐いてきた!?　どうも『月の聖女』の伝説が関係あるみたいで…